单选题 It is possible that a tax cut might have some ______ effect.

单选题 Roland was taken ______ by our strength of feeling.

单选题 He would take two aspirin and ______ out on his bed.

单选题 I don’t want to give the ______ that I'm running away from the charges.

单选题 My diet consisted almost exclusively ______ chocolate-covered cookies and glasses of milk.

单选题 Although I soon convinced him ______ my innocence, I think he still has serious doubts about my sanity.

单选题 Some foods can ______ the teeth, as of course can smoking.

单选题 Early ______ of a disease can prevent death and illness.